<template>
  <!-- 最外层盒子 -->
  <div class="login_container">
    <!-- 登录盒子 -->
    <div class="login_box">
      <!-- 头像盒子 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt />
      </div>
      <!-- 登录表单 -->
      <!-- :model用于获取表单数据 :rules用于表单验证 ref属性用户查找元素 -->
      <el-form class="login_form" :model="loginForm" :rules="loginFormRules" ref="loginFormRef">
        <!-- prop不能设置给input框 -->
        <el-form-item prop="username">
          <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            prefix-icon="iconfont icon-3702mima"
            v-model="loginForm.password"
            type="password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="loginFormReset">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 获取表单数据
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单验证
      loginFormRules: {
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur'
          }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  methods: {
    // 重置表单内容
    // 只要元素设置了ref属性，就可以通过this.$refs获取到这个元素
    loginFormReset() {
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      // 表单预验证 只有符合了表单的验证规则了才可以进行请求验证
      this.$refs.loginFormRef.validate(async valid => {
        const { data: res } = await this.axios.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.msg.error('输入信息有误')
        this.msg.success('登录成功')
        // 保存服务器穿过来的token值
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style scoped lang="less">
.login_container {
  height: 100%;
  background-color: #2b5b6b;
  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
  }
  .avatar_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 15px;
  box-sizing: border-box;
}
.btns {
  float: right;
}
</style>
